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# distributed with this work for additional information
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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# software distributed under the License is distributed on an
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# KIND, either express or implied.  See the License for the
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from __future__ import annotations

from typing import TYPE_CHECKING

from airflow.models.taskmap import TaskMap

if TYPE_CHECKING:
    from sqlalchemy.orm import Session

    from airflow.models.mappedoperator import MappedOperator


def expand_mapped_task(
    mapped: MappedOperator, run_id: str, upstream_task_id: str, length: int, session: Session
):
    session.add(
        TaskMap(
            dag_id=mapped.dag_id,
            task_id=upstream_task_id,
            run_id=run_id,
            map_index=-1,
            length=length,
            keys=None,
        )
    )
    session.flush()

    mapped.expand_mapped_task(run_id, session=session)
